GRAIN SIZE AND ACTIVATION ENERGY OF SERRATED YIELDING

Acta Metall Sin

1989, Vol. 25

Issue (4): 10-15 DOI:

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GRAIN SIZE AND ACTIVATION ENERGY OF SERRATED YIELDING

XIAO Lingang;QIAN Kuangwu Fuzhou University

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XIAO Lingang;QIAN Kuangwu Fuzhou University. GRAIN SIZE AND ACTIVATION ENERGY OF SERRATED YIELDING. Acta Metall Sin, 1989, 25(4): 10-15.

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Abstract The apparant activation energy of serrated yielding was measured bytwo different methods for a commercial brass H68. The results showed that theapparant activation energy of serrated yielding measured by a method involving(m + β) values increases with the grain size. In contrast, those measured by anothermethod without involving (m + β) values are all the same for specimens with differ-ent grain sizes. Combining with the observation of the microstructures the abovephenomena have been explained. The method to measure the true activation energyof serrated yielding has also been proposed.

Key words: serrated yielding activation energy grain size deformation twinning

Received: 18 April 1989

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y1989/V25/I4/10

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